noun
spline curve
Technical term in computer graphics and numerical analysis; a smooth curve defined by piecewise polynomial functions.
CADソフトでは、スプライン曲線を使って滑らかな形状を描く。
In CAD software, spline curves are used to draw smooth shapes.
From English 'spline' + Japanese 曲線 (curve). The term 'spline' originally referred to a flexible strip used in drafting to draw smooth curves.